Wikimedia Foundation Mediawiki CVE-2025-53502

| EUVD-2025-19888 MEDIUM
Improper Input Validation (CWE-20)
2025-07-03 c4f26cc8-17ff-4c99-b5e2-38fc1793eacc
XSS
6.5
CVSS 3.1
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CVSS VectorNVD

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
Low
Availability
None

Lifecycle Timeline

3
Analysis Generated
Mar 16, 2026 - 02:12 vuln.today
EUVD ID Assigned
Mar 16, 2026 - 02:12 euvd
EUVD-2025-19888
CVE Published
Jul 03, 2025 - 17:15 nvd
MEDIUM 6.5

DescriptionNVD

Improper Input Validation vulnerability in Wikimedia Foundation Mediawiki - FeaturedFeeds Extension allows Cross-Site Scripting (XSS).This issue affects Mediawiki - FeaturedFeeds Extension: 1.39.X, 1.42.X, 1.43.X.

Analysis

Improper Input Validation vulnerability in Wikimedia Foundation Mediawiki - FeaturedFeeds Extension allows Cross-Site Scripting (XSS).This issue affects Mediawiki - FeaturedFeeds Extension: 1.39.X, 1.42.X, 1.43.X.

Technical ContextAI

Cross-site scripting (XSS) allows injection of client-side scripts into web pages viewed by other users due to insufficient output encoding. This vulnerability is classified as Improper Input Validation (CWE-20).

RemediationAI

Encode all user-supplied output contextually (HTML, JS, URL). Implement Content Security Policy (CSP) headers. Use HTTPOnly and Secure cookie flags.

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CVE-2025-53502 vulnerability details – vuln.today
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